Skins

I'm not sure if I'm posting in the right place.  Hope so.  Does anyone know of a online source that sells skins for stuffing sausage.  Since I've never bought them online before, am looking for a place that is reliable.  I can't find them in Athens, GA.  I thought they would be easy to find.  I had no problems when I lived in NY.  I could purchase them at our local supermarket.  Also, if anyone makes their own sausage, do you use the real or synthetic skins?  Thanks in advance for any help I can get.